mixins

I have a Mix-in that reflects on the receiver class to generate some code. This means that I need to execute the class method at the end of the class definition, like in this trivially dumbed down example: module PrintMethods module ClassMethods def print_methods puts instance_methods end end def self.included(receiver) receiver.extend ClassMethods end end class Tester include PrintMethods def method_that_needs_to_print end print_methods end I'd like to have the mixin do this for me automatically, but I can't come up with a way. My first thought was to add receiver.print_methods to self

I'm trying to serialize a collection using mixings, but Jackson won't save the type info. This is a basic test illustrating what happens: public class CollectionSerializationTest { interface Common extends Serializable { } class A implements Common { private static final long serialVersionUID = 1L; } @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "type") @JsonSubTypes({ @JsonSubTypes.Type(value = A.class, name = "CODE") }) class AMixIn { } @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "type") @JsonSubTypes({

How do you call a mixin dynamically? A use case might be to generate a style guide: // The mixin which should be called .typography-xs(){ font-family: Arial; font-size: 16px; line-height: 22px; } // The mixin which tries to call typography-xs .typography-demo(@typographyName, @mixinName) { @{typographyName} { &:before{content: '@{typographyName}';} // Calling the mixin dynamically @mixinName(); } } // Example call of .typograhpy-demo .typography-demo(xs, typography-xs); Is such a dynamic call possible at all with less css? You cannot at present dynamically call as you desire. You can, however,

I am using a mixin to separate a range of functionality to a different class. This Mixin is only supposed to be mixable with the only child class: class Mixin: def complex_operation(self): return self.foo.capitalize() class A(Mixin): def __init__(self): self.foo = 'foo' in my method Mixin.complex_operation PyCharm gives warning 'Unresolved Attribute Reference foo'. Am I using the mixin pattern correctly? Is there a better way? (I would like to have type hints and autocompletion in my mixins, and I would like to have multiple mixins.) Declare the necessary fields in the Mixin like: class Mixin: